from Robert Wermuth, author of "Wermuth's GREEKBOOK"

The verb tenses in Greek are divided into six basic “systems” called Principal Parts (“mouse-over” images, then click, and click again for enlarged viewing). Each system has a distinct verb stem, from which all the various tenses and their respective “voices” are built (first image). In order to recognize a Greek verb, it is necessary to be familiar with its principal parts.The “regular” principal parts system is represented by the normal, “model” Greek verb λύω. The Principal Parts chart represented within the above image files delineates in alphabetical order the principal parts of many frequently encountered “irregular” verbs occurring in the Greek New Testament. To view all the pages at full-page size or to download the entire PDF, click here or anytime from the sidebar.